Reel for electric conductors



March 25, 1930. A. E. F. MOONE 1,751,836

REEL FO-R ELECTRIC CONDUGTORS Filed Oct. 28, 1924 5 Sheeis-Sheet 1 I N VEN TOR.

ALfiK-ETE F/Woome.

BY MWWM A TTORNE Y.

3 Sheeis-Sheet 2 552 Jfii A. E. F. MOONE REEL FQR ELECTRIC CONDUCTORSFiled Oct. 28, 1924.

March 25, 1930.

fi 34 i A INVENTOR.

ALBEETE/ Moo/v51 WW5 M ATTORNEY.

= March 25, 1930.

Filed Oct. 28, 1924 A. E. F. MOONE REEL FOR ELECTRiC CONDUCTORS 3SheetsSheet 5 INVENTOR. AL 55/276. F/VOOA/f:

ATTORNEY.

H Patented 2F,

' Laminar 1 r. noonnyor cmcnoo, .ILLmoIs aunt. r03. mncQIc connuc'ronsApplication filed October as, 1924." Serial No. 746,298. 1

My invention relates to an improved construction of reels for electricconductors of v the class in which rotation of the'reel actuates contactmechanism bywhich the circuit 5' through the. electricconductors-isclosed for the greater part of the rotation of the reel and opened whenthe conductors-are nearly or wholly wound on the reel. p By my present.invention I provide a cas- .10 ing, preferabl of sheet metal forenclosing the reel and e ect'ric contact mechanism, and

a shaft portion for-the reel preferablyLof molded insulating materialwhich is hollow to. contain the devices employed for-actuating 1 thecontact mechanism. The molded insulating material may if desired,ext'endsufficiently toform a part or all of the reel itself and'in any eventthis material serves to insulate a movable member within the hollowshaft;-

which is rotary-with the reel and shaft and movable relatively theretoto actuate the contact mechanism, the total amount of motion of saidmemberbein much greater'than that required to actuate t e contact, topermit the conductors carriedby the reel to be unwound from the reel toany desired extentwith the contact in its actuated condition.Withdevices of this kind'it is desirable that a number of turns of theelectric conductorss'hall be carried by the reel so that the electricdevice controlled by the conductors -may be moved to a greater orless'distance from the casing of the device as desired, and beoperativein any said position and that when the reel is torsthereon,'the contact is open thus electric device which itmay be desiredto enclosing the'reel. I a

r By my present invention I also provide 46 an improved construction ofspring adjusting spring employed to wind the conductors on the reel whenthe electric device operated by .current flow through the conductors isreleased.

actuated to nearly or quite wind the conducopening the circuit throughthe conductors. {The de l"; vice controlled by the electric conductorsmay be a cigar lighter, an electric lamp-.orTany mechanism forregulating the tension on the a The above and other objects of my inven-.tion will be more completely understood by I reference to theaccompanying drawin y showing preferred embodiments thereof in which I vI Fig. 1 shows my device in vertical longitudinal sectional view, thereel in this constructionconsistin of sheet metal stampings, Itbhisv2iew being ta en along the line 1'1 in 1g.

Fig. 2 is a side elevation of the device shown in Fig. 1,

Fig. 3 a detail side view to an enlar ed scale of a part of the leveremployed to ad3ust the reel operating spring indicated in Fig. 1,

Fig. 4 shows in a View similar to Fig. 1 a modified construction inwhich the insulating material of the shaft extends to form a partofthereel,

' Fig. 5 shows in. a view similar to Fig. 1 a

construction in which the insulating material of the reel, v

Fig. 6 shows in a view similar to Fig. 1 a constructionsimilar to thatshown in Fig. 5, a different construction of bearing surfaces for theshaft being shown in this figure,

Fig. 7 shows in a view similar to Fig/'1 a reel and shaft constructionsimilar'to that shown in Figs. 5 and6, the differencebeing shaft isextended to form theenti're that a modified form of contact making mechlanism is illustrated in this construction,

Fig. 8 is a sectional view to an enlarged scale of the rim of the reelconstruction in Fig. 5 taken along the line-8-8,

- Fig. 9 shows in a View similar to Fig. 1 a construction similar tothat shown in Figs.

5-7 inclusive, the difference being that adiffrom that shown. in any ofthe preceding figures, is employed, and

Fig. 10 shows in a View similar to Fig. 1 and to an enlarged scale, aortion of a reel similar to that shown inig. 9, provided shown .ferentform of contact making mechanism with a modified form of contact makingmechanism from that shown in Fig. 9, actuated by operatingmechanismsimilar to that illustrated in Fig. 9. Y

Similar numerals refer to similar throughout the several views.

As shown in Figs. 1 and2 my device'consists of a casing 10, madepreferably from sheet metal having opposite side walls 10, 10 se arablefrom each other to facilitate assem ling the device, the parts beingheld to ether b suitable screws as indicated. The cy indrica surface ofthe casin 10 has projecting therefrom, as indicated in Fig. 2 andpreferably tangentially to the said cylindrical surface, a tube 11,through which electric conductors 12 and 13 extend to an electricallyoperated device 14, which ma be a cigar lighter, or any device ada tefor electric operation which it is desire to move to various distancesfrom the casing 10 when the electric device is in operation. i Thecasing 10 contains-a. shaft 15, preferably of molded insulation,providedwith a bore 16 in which a nut 17 is disposed so that it may movefreely in said bore axially of the shaft, but be restrained from rotarymovement in the shaft in any suitable manner, for example, by providingsaid bore and said nut with similar and co-operating flat surfaces. Theside wall 10 of the casing has extending therethrough and insulatedtherefrom, a screw 18 held in place b a clamping nut 19, said screwbeing provi ed with a collar 20 on the inside of the casing to hold thescrew securely to the casing. The inner end of the screw 18 is providedwith left hand threads as indicated at 21 to engage the threads in thenut 17 and at its extremevleft hand end the screw 18 is provided with aportion 22 of reduced diameter forming a bearing support for the screwin a corresponding opening formed therefor in the material of the shaft.The right hand end of the screw 18 is provided with a binding screw' 24forsecuring one wire from the source of current supply to said screw 18.The other conductor from said source of supply is connected to thecasing 10 by means of a second binding post 25 in electrical contactwith the casing as mdicated;

The insulating material adjacent the collar 20 engages a metallic collar26 to hold it in clamping engagement between the insulating material andthe side wall 10 so that the outer cylindrical surface of the collar 26may form one bearing for the shaft 15. This bearing surface is engagedby the inner. surface of a sleeve 27 secured in a suitable counter boretherefor in the end of the shaft 15 so that it rotates with said shaft.The shaft 15 carries a contact making mechanism 28 extend"- ing radiallythrough the shaft and insulated thereby from the metal parts of thedevice, the inner end of this mechanism being shown in'section toillustrate the plunger contact 29 held by a suitable spring so as toextend slightly into the bore 16 in the path of the nut 17.

The shaft 15 has projectin therefrom a cylindrical flange 30 engage onopposite sides by the two members 31 and 32 of the reel, these membersbeing made preferably from stamped sheet metal to tightly clamp saidflange between them, to form the web of the reel, and at their outer edes to form the groove ortion of the reel. The parts 31 and 32 may econveniently held together by riveted or bent lugs 33 formed from one ofsaid parts for example the part 32 and extendin through the other ofsaid parts as indicate The part 32 of the reel is purposely formed asindicated to provide a side recess in the reel in which a spiral spring34"is contained, the outer end of said spring being secured to the reelby means of a screw or bolt 35 which also forms a convenient fasteningdevice for holding the inner end of one of the conductors 12 inelectrical contact with the reel and spring. The part 32 of the reel isprovided with a central tubular extension or sleeve 36 fitting theadjacent cylindrical portion of the shaft 15 to form one of its bearingsurfaces. The side member 10 of the casing supports a cylindrical member37 provided at its inner end with a counterbore so that it may extendover the end of the shaft 15 into the reel recess containing the spring34 and the inner end of said spring is secured to said cylindricalextension as indicated. The counterbore in the member 37 is of adiameter forming a sliding fit with the outer'surface of the sleeve 36thus supportingthe left hand end of the shaft 15. The casing member 10is oifset at its central portion as indicated at 38 to form a tubularsupport for the member 37, holding it in axial alignment with the shaft15, but permitting rotary movement. of said member in said tubularsupport. The outer end of the member 37 extends through the casingmember 10 to engage the lever 39 mounted thereon, which lever is held inplace on said exten sion by'a clamping screw 40 and washer 41 asindicated, a shoulder portion being provided on saidextension engagingthe inwardly flanged outer end of the tube 38 to prevent axial movementof the member 37 in the casing. As indicated in Fig. 3 the opening inthe lever 39 provided to engage the end of the extension 37 1s fiatsided as indicated at 39* to prevent relative rotation between saidlever and said extension. As a result, rotar movement of said lever,rotates said extension 37 and'thus changes the tension on the spring 34as desired. To provide a convenient means for holding the lever 39 indesired adjustment,,I form from the side wall 10 of the casing, a hookshaped stop 42 in the path of said lever which, under the actionof thespring 34, en-

gages one edge of the lever to hold it not only against rotary movement,but also to prevent its movement away from the side member 10? of thecasing. As a result of this construction, when it is desired to changethe spring has the desired tension, and the lever is again permitted toengage the stop 42 as shown; on the other hand if it is desired toreduce the tension of the spring, the lever,- which is preferably ofmetal having suflicient spring action to permit it, is moved from theside member 10 sufiiciently to clear the stop 42 and rotated in acounterclockwise direction for the relation of the parts shown in- Fig.2, until the tension on the spring is reduced to the desired amount, andthe lever is then permitted to engage the stop 42 as shown,

The inner end of the other electric conductor 13 passes through asuitable opening therefor in the reel and is secured to the contactmechanism 28 'b a suitable binding screw. As a result 0 the constructiondescribed when the nut 17 is moved to the right on the shaft 15 for therelation of the parts shown in Fig. 1, until said nutis in engagementwith the spring contact 29, electrical connection is established betweenthe screw 18 and the conductor 13 and thus current is caused to flowthrough the electric conductors and the actuated device 14. The nut 17and spring contact 29 are preferably so adjusted that when theconductors 12 and 13 are nearly wound on the reel the ,nut is just outof engagement with said spring contact, thus affording suflicientseparation between the nut and the spring contact to insure the deviceagainst current flow when the conductors are wholly wound on the reel,also that when the conductors are slightly 1111-. wound from the reelthe nut 17 is moved into engagement with the'contact 29 and that furthermovement of the conductors from the reel, moves the nut 17 under thecontact 29 and still in electrical engagement with it, which conditioncontinues for any amount of the conductors subsequently'unwound from thereel. In this way I provide a means for insuring current flow throughthe conductors and the electrically o erated device for any condition ofthe con uctors on the reel excepting when said conductors are nearly orwholly wound upon the reel and thus I facilitate using the electricallyoperated device at any desired distance from the casing.

It will be observed that all of the movable parts involved incontrolling the contact mechanism, are contained within the shaft of thedevice and that by making the shaft of molded insulating material, theshaft may not only be readily constructed to facilitate mounting thecontact making mechanism, but also to facilitate securing the otherrotary parts to the shaft as described. It will also be observed that asa result of mounting the spring within the reel, the device may be madecompact and of little more bulk than required to take care of theelectric condutztors wound on the reel, and further-that the metal partsmay conveniently be' made by simple punching and stamping operations. I

The construction shown in Fig. 4 is similar,

to that illustrated in Fig.1 excepting that the shaft 15" isextendedradially to form the web and flange member 31 of the reel, the

other side member 32 of said real being formed preferably from a metalstamping having lugs or ears 33 extendin through the web 31 to hold th'eparts toget er. In this case the sleeve 36" is separate from the reelmember 32* but is carried b the shaft in the same manner and serves t esame purpose as the sleeve 36 described in connection with theconstruction shown in Fig. 1. In the construction of Fig. 4 the sleeve27 is car- I ried on the outer surface of the shaft 15, instead of in abore therein as illustrated for the .sleeve 27 in Fig. 1, and a suitablebearing surface is provided for this sleeve 27,

by forming a tubular member 43 on the side member of the casing, havinga sliding fit with the outersurface ofthe sleeve 27. In other respectsthe construction shown in Fig.

, 4 is the same as that illustrated in Fig. 1 and operates in the samemanner to secure the same results.

The construction illustrated in 5 differs from that shown in Fi s. 1 and4 in that the insulating material of t e shaft15" is extended to formthe entire groove portion of-the reel. In this case, inasmuch as theentire reel is of insulating material the contact mechanism 28" isconveniently in the form of a conducting rod extending through the webof the reel with a socket at its outer end to receive the end of one ofthe electric conductors, a clamping screw 28 being provided to hold theend of said conductor in place. The inner end of the rod 28 contains aspring contact 29 similar to the spring contact 29 and similarlydisposed excepting that in this. case the nut 17 is to the right of thespring contact when the circuit thro'ughthe device is open instead of-tothe left of the contact as shown in Figs. 1 and 4. In this case thescrew 18' is provided with right hand threads, the nut and screw beingotherwise similar to the corresponding devices shown and described inconnection with Figs. 1 and 4 and operating in the same manner to securethe same result excepting as to the direction of motion of the nut 17when the conductors are unwound from the reel. In this constructiom-thebearing sleeve 27 is provided with an inturned flan e on its outer endengaging a shoulder 44 on t e side member of the casing instead of enaging the material insulating the screw 18 om the casing. In this mannerany thrust of the shaft 15 is prevented from wearin the materialinsulatextension similarly embedded in the material of said shaft.

engage and take the thrust of the spring 34 through the clamping screwor bolt 35. The cup is continued at its inner edge into an outwardlextending tube forming a bearing sleeve 36, supported and operatlngin'the same manner and for the same purpose as described above for thesleeves 36 and 36.

To insure against possible rotation of the cup 45 in the reel, I providethe cup at intervals, as indicated in Fig. 8, with outwardly extendingkeys 46 engaging similar keyways formed in the shaft and reel'structure15", as a result of which the cup may be inserted in the recess in thereel without undue pressure and with the certaint I move angularly inthe ree and thus that the tension of the spring 34 communicated to thecup will be effectively communicated to the reel without undue wear ordanger of breaking the material'of the reel.

In the construction shown in Fig. 6, the shaft and reel 15 are ofsimilar construction to the corresponding parts shown in Fig. 5, therincipal differences being that the sleeve 27 15 provided with anextension embedded in the material of the shaft 15 and that the bearingsleeve 36 is also provided with an In this construction the conductingrod 28 is located to avoid possible contact with the sleeve extensionsembedded in-the shaft and is provided with an end: clamping screw 28 asindicated. Inthisconstruction the bearing sleeve 27 extends beyond theend of the shaft to receive within it the tubular bearing surface 46provided on the side member of the casing to constitute one of thebearing surfaces of the'shaft and this extended portion of the sleeve 27also contains the parts of the screw 18 effective in clamping said screwto the side wall of the casing. In other respects the construction issubstantially the same and operates in the same manner and produces thesame results.

as the construction shown in Fig. 5.

In the construction shown in Fig. 7, the shaft and-reel construction15.is substantially the same as shown and described in connection-withFig. 5, the principal difference being that the shaft is shorter thanthat shown in Fig. 5. In Fi 7 the bore of the shaft contains the head 4of a screw 18 provided with left hand threads to enga e correspondingthreads in a nut 48 rigi y se cured in a tubular extension 49 projectingto the right from the casing 10 of the device.

In this construction the spring contact 29 is in sliding, electricalcontact at all times with the head 47 of the screw 18. The tubularextension 49 is inwardly flanged at its outerof the extension 49 and theouter en of the that it cannot osedbetween the the flan ed end".ductorswound on the reel.

mechanism 50 is provided with a binding screw 51 for receiving oneof-the wires from the source of electric supply. The inner end of themechanism 50 is rovided with a spring contact 52 enga ed by the end ofthe screw 18 when the con uctors are but partly removed from the reel,the motion of the contact 52 being suificient to permit as manyrotations of the reel as may be required to wholly remove the conductorstherefrom, after the initial unwinding movement of the reel hasestablished electrical connection between the contact 52 and the screw18. In other respectsthe construction illustrated in Fig. 7 is similarto and operates in substantially the same manner to secure the sameresults as that described in connection with Fi s. 5 and 6. v

. .the construction shown in Fig. 9, the shaft and reel construction 15is similar to that shown and described in connection with Figs. 5 and 7,the difference being the form of contact mechanism employed. In thisconstruction a screw 18 is supported in the this construction the nut 17is provided with a peripheral groove engaging the lower end of a contactmember 52' pivotally supported at 53 in a suitable clearance therefor inthe shaft construction so that the upper end of said member 52' is-inline with a sprin contact 54 secured to the web of the sha and reelconstruction. A fixed stop 55 extends from the shaft and reelconstruction in line with the contact 54 to limit its movement to theleft for the relation of parts shown in Fig. 9. The parts described areso related that when-the reel is in a position completely winding theconductors thereon, the upper end of the member 52' is in its extremeleft hand position, sufliciently removed from the spring contact 54 toinsure interruption of the electric circuit .through the conductors.Initial unwinding movement of the conductors moves the'member 52' intoengagement with the spring contact 54 and continued motion of the reelin its unwinding direction moves the spring contact 54 further from itsback stop 55 thus maintaining the closure of the circuit through theconductors for all conditions of unwinding. of the conductors. Aconducting strip 56 extends from the spring contact 54 to the grooveportion of the reel where it is engaged by a clamping screw 57 toreceive the inner end of one of the con- In other respects theconstruction is similar to and oper- Y reel. When the reel begins itsunwinding movement, the'member 52" is moved into 'en- 7 results as theconstructions above described.

- In Fig. 10 I show a modified contactmec'hanism for operation by anactuating mechanism of a construction similar to that shown in Fig. 9.In this case a member 52 is pivotprovide for said memberin the shaft andreel construction 15. 'The screw and nut operating mechanism shown inFig. 9 are employed to operate the member 52", the only ifierencebeingthat the" screw and nut are.

provided with left hand threads instead of right hand threads as shownin Fig. 9. In the construction shown in Fig. '10,,movement to the leftof the upper end of the member 52 engages a spring contact 58 carried bythe reel construction 15, a clamping screw 59 extending through the reelconstruction from its groove portion to the housing of said springcontact to make electrical connection with the inner end of one of theconductors wound on the reel. The relation of the parts is such thatwhen the conductors are fully wound on the reel the member 52 occupies aposition relatively to the contact 58 substantially as shown in Fig. 10,positively opening the circuitthrough the electric conductors on thegagement with the contact 58 closing the circuit to the conductors onthe reel and this condition is continued during the entire'unwindingoperation, the possible movement of the spring contact 58 beingpurposely made sufiicient to permit the member 52 to move to the leftthe full amount of its motion corresponding to the numberof rotations ofthe reel required to entirely unwind the conductors therefrom. In otherrespects the reel, actuating spring, casing, screw and operatin nut maybe the same as shown and describe in connection with Fig. 9.

' While I have-shown my invention in the particular embodiments abovedescribedfit will be understood that I do not limit myself to this exactconstruction as I may employ equivalents known to the art at the time ofthe filing of this application without departing from the scope of theappended claims.

What I claim is: 1. In areel for electric conductors, the combination ofa support, a hollow shaft mounted for rotary movement on said support, areel carried by said shaft, a fixed threaded member carried by saidsupport, a. second threaded member rotary with and movablelongitudinally of said shaft and engaging said fixed member, and anelectric contact carried by said shaft to control the circuit throughconductors on said reel by movement of said second member relatively tosaid shaft.

2. In a reel for electric conductors, the combination of a support, ahollow shaft mounted for rotary movement on said support,'a reeltherewith, and sa1d fixed member, and an electric contact carried bysaid shaft to control the circuit through ally supported at 53" in asuitable clearance conductors on said reel by movement of stud secondmember relatively to said shaft, said ,second'member being containedwithin said shaft. and having flat sided engagement I contact projectinginto thepath of said second member. I

v 3. In a reel for electric conductors the combination of a support, ahollow shaft mounted for'rotar I movement on said su reel carried y saidshaft, a fixed t rea member carried by said support, a second threadedmember rotary with and movable lon 'tudinally of said shaft and engagingsai fixed member, and an electric contact'carried by said shaft tocontrol the circuit through conductors on said reel by movement of saidsecond member relatively to said shaft, said second member beingcontained within said shaft and having flat sided engagement therewith,and said "contact, projecting into the path of said second member, saidshaft being ofinsulating material insulating said second member and saidcontact and said fixed member being insulated from said support. j '4.In a reel for electric conductors, the combination of a support, ahollow shaft mounted for rotary movement on said support, a reel carriedby said shaft, 0. fixed threaded member carried by said support, asecond threaded member rotary with and movable longitudinally of saidshaft and engaging said fixed member, and an electric contact carried bysaid shaft to control the circuit through conductors on said reel bymovement of said second member relativelyv to said shaft,' said contacthaving yielding engagement with its actuating device permitting aplurality of rotations of said reel with said contact in itsactuated'condition.

5. In a reel for electric conductors, the comport a ded so tudinallyofsaid shaftandengaging sald I bination of a support, a hollow shaftmounted for rotar movement on said support, a reel carried by saidshaft, a fixed threaded member carriedby said support, a second threadedmember, rotary with and movable longitudinally of said shaft andengaging said fixed member, an electric contact carried ed member rotarywith and movable longiengagement with said 7. In a reel for electricconductors, thecombination' of a support, a hollow shaft mounted forrotary movement on said support, a reel carried by said shaft, a fixedthreaded member carried by saidsupport, a second threaded member rotarywith and movable longitudinally of said shaft and so engaging sald fixedmember, an electric contact carried by said shaft to control the circuitthrough conductors'onsaid reel by movement of said second memberrelatlvely'to said shaft, said shaft being of mold- 5 ed insulatinmaterial, metal sleeves carried by said sha forming its bearingsurfaces, 7 said shaft having an outwardly extending circular flange,and said reel comprising sheet metal stampings held to ether in clampingange,'one of said stam in forming a spring housing, and a reel rivingsprin in said housing having one I of its ends secure thereto.

8. In a reel for electric conductors, the com bination of a support, ahollow shaft mount- .ed for rotar movement on said support, a reelcarried y said shaft, a fixed threaded 4 member carried bysaid support,a second threaded member rotary with and movable lon tudinally of saidshaft and engaging said fixed member, an electric contact carried bysaid shaft to control the circuit through conductors on said reel bymove-' ment of said second member relatively to said shaft, said shaftbeing of moldedinsu lating material, metal sleeves carried by saidshaftforming its bearing surfaces, said shaft having an outwardly extendingcircular flange, and said reel comprising sheet metal "stampings heldtogether in clamping engagement with said flange, one of said stampingsforming a spring housing, a reel driving spring 1n said housing havlngone of its ends secured thereto, and an, extension from said supportinto said housing secured to the other end of said spring, saidextension forming a bearing for one end of said shaft.

, 9. In a reelfor electric conductors, the combination ofa support, ahollow shaft mounted for rotary movement on said support, a'reel carriedby said shaft, a fixed threaded membercarried by said support, a secondthreaded member rotary with and movable longitudinally of said shaft andas engaging said fixed member, an electric consaid support into saidhousin secured to the other end of said spring, an a lever rotaryrelatively to said support and secured to said extension to change thetension on said spring 'as desired.

10. In a reel for electric conductors, the

combination of a support, a hollow shaft mounted for rotary movement onsaid sup port, a reel carried by said shaft, a fixed threaded membercarried by said su ort, a second threaded member rota wit and movablelongitudinally of said s aft and en-- gaging said fixed member, anelectric contact carried by said shaft to control the drcuit throughconductors on said reel by movement of said second member relatively tosaid shaft, said shaft being of molded insulating material, metalsleeves carried by said shaft forming its bearing surfaces, said shafthaving an outwardly extending circular flange, and said reel comprisingsheet metal stampings held together in clamping engagement with saidflan e, one of said stampings forming a spring ousin'g, a reel drivingspring in said housing having one of its ends secured thereto, anextension from said support into said housin secured to the other end ofsaid spring,a ever rotary relatively to said support and secured to saidextension to change the tension on said spring as desired, and aretaining stop on said support preventing back rotation of said lever,said lever being of spring material permitting its movement oversaidstop in adjusting said spring tension.

11. The combination with a rotatable reel,

of' a conductor wound thereon, a terminal connected to one end of theconductor, a stationary circuit terminal spaced from the con ductorterminal transversely of the reel, a

switching member threaded on one of the terminals on an axis identicalwith that of the reel and extending transversely of the reel toward theother terminal, the other terminal having a contact face adapted tobeengaged by the switching member; and

means fast with respect to the said other terminal and engaging theswitching member whereby a rotation of the reel rotates the switchingmember so as to cause the switching memberto move towards or away fromthe said contact face.

Ill

12. The combination with a rotatable reel of a conductor wound thereon,a terminal connected to one end of the conductor, a stationary circuitterminal spaced from the conductor terminal axially of the reel, aswitching member threaded on one of the terminals on an axishavingsubstantially the same direction as that of the reel and extendingtoward the other terminal, the other terminal having a contact faceadapted to be enga ed by the switching member; and means ast withrespect to the said other terminal and engaging the switching memberwhereby a rotation of the reel rotates the switching member so as tocause the switching member to move towards or away from the said contactface.

In witness whereof, I hereunto subscribe my name this 17th day ofOctober, A. D. 1924.

ALBERT E. F. MOONE.

